Although I did this as a profile, which usually don't have any background work, I feel this one would benefit from some. I was thinking of a simple black and white background to show a hint of something. The work is vector graphics. I would appreciate others opinions on possible improvements.

I think it would be good to have some nature background as a contrast to the metal. Organic forms in the background would probably complement the mechanical look of the train. Maybe a scene that could be from an area where the train used to be used? The image is a bit small to give more critique on the train itself.